- Add TelegramLocation, TelegramVenue, and TelegramMessageWithLocation types
- Add formatLocationMessage() to convert location/venue shares to text
- Add extractLocationData() for structured location access in ctxPayload
- Handle both raw location pins and venue shares (places with names)
- Include location in reply-to context for quoted messages
Location messages now appear as:
- [Location: lat, lon ±accuracy] for raw pins
- [Venue: Name - Address (lat, lon)] for places
ctxPayload includes LocationLat, LocationLon, LocationAccuracy,
VenueName, and VenueAddress fields for programmatic access.
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